:root {
  --bg: #f4efe6;
  --bg-strong: #e5d4b7;
  --panel: #fffaf2;
  --line: #d3c3a6;
  --text: #2f2618;
  --muted: #72644c;
  --accent: #bc5b2c;
  --accent-strong: #93421d;
  --user-bubble: #f4e4d1;
  --assistant-bubble: #fdf7ee;
  --shadow: 0 18px 50px rgba(74, 48, 17, 0.12);
  --radius: 18px;
  --font-body: "Avenir Next", "PingFang SC", "Helvetica Neue", sans-serif;
  --font-display: "Georgia", "Times New Roman", serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(188, 91, 44, 0.18), transparent 30%),
    linear-gradient(180deg, #f7f1e8 0%, #f0e4cf 100%);
  color: var(--text);
  font-family: var(--font-body);
}

body {
  min-height: 100vh;
}

.shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px 20px 32px;
}

.card-panel {
  background: rgba(255, 250, 242, 0.9);
  border: 1px solid rgba(114, 100, 76, 0.18);
  border-radius: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.local-shell {
  display: grid;
  gap: 18px;
}

.local-setup,
.local-chat-header,
.local-context,
.local-messages,
.local-composer {
  padding: 24px;
}

.local-eyebrow {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(188, 91, 44, 0.12);
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.local-title,
.local-chat-title {
  margin: 16px 0 10px;
  font-family: var(--font-display);
}

.local-title {
  font-size: clamp(34px, 6vw, 56px);
  line-height: 1;
}

.local-subtitle {
  margin: 0 0 20px;
  color: var(--muted);
  line-height: 1.8;
}

.setup-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.article-input {
  min-height: 220px;
}

.local-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.local-chat {
  display: grid;
  gap: 18px;
}

.local-chat-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.local-context h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
}

.local-context-text {
  max-height: 240px;
  overflow: auto;
  white-space: pre-wrap;
  line-height: 1.8;
  color: var(--muted);
}

.local-messages {
  min-height: 320px;
  max-height: 520px;
  overflow: auto;
  display: grid;
  gap: 16px;
  align-content: start;
}

.local-composer {
  display: grid;
  gap: 12px;
}

.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.home-hero {
  min-height: calc(100vh - 80px);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
  align-items: center;
}

.home-copy {
  padding: 28px 4px;
}

.home-eyebrow,
.feature-kicker {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 8px 12px;
  background: rgba(188, 91, 44, 0.12);
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.home-copy h1 {
  margin: 18px 0 18px;
  font-family: var(--font-display);
  font-size: clamp(46px, 7vw, 78px);
  line-height: 0.96;
}

.home-lead {
  font-size: 20px;
  line-height: 1.7;
  color: #4a3d2a;
}

.home-copy p {
  color: var(--muted);
  line-height: 1.8;
}

.home-actions {
  display: flex;
  gap: 12px;
  margin-top: 26px;
  flex-wrap: wrap;
}

.home-link-btn {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.home-panel,
.home-grid {
  display: grid;
  gap: 18px;
}

.feature-card {
  background: rgba(255, 250, 242, 0.9);
  border: 1px solid rgba(114, 100, 76, 0.18);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 24px;
}

.feature-card h2 {
  margin: 16px 0 12px;
  font-family: var(--font-display);
  font-size: 28px;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.home-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 12px 0 28px;
}

.auth-card {
  width: min(960px, 100%);
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  border: 1px solid rgba(114, 100, 76, 0.18);
  background: rgba(255, 250, 242, 0.88);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
  border-radius: 28px;
  overflow: hidden;
}

.auth-brand {
  padding: 48px 42px;
  background:
    linear-gradient(140deg, rgba(188, 91, 44, 0.18), rgba(255, 250, 242, 0.3)),
    linear-gradient(180deg, rgba(229, 212, 183, 0.62), rgba(255, 250, 242, 0.9));
}

.auth-brand h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-size: 42px;
  line-height: 1.05;
}

.auth-brand p {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}

.auth-badges {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.auth-badge {
  border: 1px solid rgba(147, 66, 29, 0.18);
  background: rgba(255, 250, 242, 0.7);
  border-radius: 999px;
  padding: 10px 14px;
  font-size: 13px;
  color: var(--accent-strong);
}

.auth-form-wrap {
  padding: 42px 34px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  justify-content: center;
}

.tabs {
  display: inline-flex;
  background: #efe4d4;
  border-radius: 999px;
  padding: 4px;
  width: fit-content;
}

.tab-btn {
  border: 0;
  background: transparent;
  padding: 10px 16px;
  border-radius: 999px;
  cursor: pointer;
  color: var(--muted);
  font-weight: 600;
}

.tab-btn.active {
  background: #fff7eb;
  color: var(--text);
  box-shadow: 0 6px 18px rgba(74, 48, 17, 0.1);
}

.auth-form {
  display: grid;
  gap: 14px;
}

.auth-form.hidden,
.hidden {
  display: none !important;
}

label {
  display: grid;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
}

input,
textarea,
button {
  font: inherit;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(255, 251, 245, 0.96);
  border-radius: 14px;
  padding: 12px 14px;
  color: var(--text);
  outline: none;
}

textarea {
  resize: vertical;
  min-height: 100px;
}

input:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(188, 91, 44, 0.12);
}

button {
  border: 0;
  cursor: pointer;
}

.primary-btn,
.secondary-btn,
.ghost-btn,
.danger-btn {
  border-radius: 14px;
  padding: 12px 16px;
  font-weight: 700;
}

.primary-btn {
  color: #fff8f1;
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
}

.secondary-btn {
  color: var(--text);
  background: #eadcc6;
}

.ghost-btn {
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
}

.danger-btn {
  color: #fff8f1;
  background: #8f3e2a;
}

.auth-note,
.status-line,
.hint {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.error-box {
  background: rgba(143, 62, 42, 0.08);
  color: #7c2f1d;
  border: 1px solid rgba(143, 62, 42, 0.18);
  border-radius: 14px;
  padding: 12px 14px;
}

.app-shell {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 20px;
  min-height: calc(100vh - 56px);
}

.sidebar,
.main-panel {
  background: rgba(255, 250, 242, 0.9);
  border: 1px solid rgba(114, 100, 76, 0.18);
  border-radius: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.sidebar {
  padding: 20px;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  gap: 18px;
}

.brand-title {
  font-family: var(--font-display);
  font-size: 30px;
  margin: 0;
}

.brand-subtitle {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.conversation-list {
  display: grid;
  gap: 10px;
  align-content: start;
  overflow: auto;
}

.conversation-item {
  width: 100%;
  text-align: left;
  padding: 14px;
  background: rgba(255, 247, 235, 0.9);
  border: 1px solid transparent;
  border-radius: 16px;
}

.conversation-item.active {
  border-color: rgba(188, 91, 44, 0.4);
  background: rgba(244, 228, 209, 0.95);
}

.conversation-item-title {
  display: block;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 5px;
}

.conversation-item-time {
  font-size: 12px;
  color: var(--muted);
}

.sidebar-footer {
  display: grid;
  gap: 10px;
}

.user-chip {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  border-radius: 999px;
  padding: 8px 12px;
  background: #efe2cc;
  color: var(--text);
  width: fit-content;
}

.main-panel {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  overflow: hidden;
}

.panel-header {
  padding: 24px 26px 18px;
  border-bottom: 1px solid rgba(211, 195, 166, 0.55);
}

.panel-title {
  margin: 0;
  font-size: 24px;
  font-family: var(--font-display);
}

.panel-subtitle {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.6;
}

.original-box {
  padding: 18px 26px;
  border-bottom: 1px solid rgba(211, 195, 166, 0.55);
  display: grid;
  gap: 12px;
}

.original-actions {
  display: flex;
  gap: 10px;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.messages {
  padding: 24px 26px;
  overflow: auto;
  display: grid;
  gap: 16px;
  align-content: start;
}

.message {
  display: grid;
  gap: 8px;
  max-width: min(760px, 100%);
}

.message.user {
  margin-left: auto;
}

.message-role {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.message-bubble {
  border-radius: var(--radius);
  padding: 14px 16px;
  line-height: 1.7;
  white-space: pre-wrap;
}

.message.assistant .message-bubble {
  background: var(--assistant-bubble);
  border: 1px solid rgba(211, 195, 166, 0.65);
}

.message.user .message-bubble {
  background: var(--user-bubble);
  border: 1px solid rgba(188, 91, 44, 0.18);
}

.message.system .message-bubble {
  background: rgba(143, 62, 42, 0.08);
  color: #7c2f1d;
  border: 1px solid rgba(143, 62, 42, 0.22);
}

.composer {
  padding: 18px 26px 24px;
  border-top: 1px solid rgba(211, 195, 166, 0.55);
  display: grid;
  gap: 12px;
}

.composer-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.small {
  font-size: 12px;
}

@media (max-width: 920px) {
  .setup-grid,
  .local-chat-header,
  .home-hero,
  .auth-card {
    grid-template-columns: 1fr;
  }

  .home-grid,
  .app-shell {
    grid-template-columns: 1fr;
  }

  .local-chat-header {
    display: grid;
  }

  .sidebar {
    grid-template-rows: auto auto auto auto;
  }
}